package com.heima.kafka.sample;

import org.apache.kafka.clients.producer.*;

import java.util.Properties;

public class KafkaStreamProducerQuickStart {

    public static void main(String[] args) throws Exception {
        // 1. 定义kafka的配置信息
        Properties properties = new Properties();
        // 1.1 设置kafka服务器连接信息
        properties.put(ProducerConfig.BOOTSTRAP_SERVERS_CONFIG, "192.168.200.130:9092");
        // 1.2 设置key和value的序列化器
        properties.put(ProducerConfig.KEY_SERIALIZER_CLASS_CONFIG, "org.apache.kafka.common.serialization.StringSerializer");
        properties.put(ProducerConfig.VALUE_SERIALIZER_CLASS_CONFIG, "org.apache.kafka.common.serialization.StringSerializer");
        // 1.3 ack机制
        properties.put(ProducerConfig.ACKS_CONFIG, "1");
        // 1.4 最大重试次数
        properties.put(ProducerConfig.RETRIES_CONFIG, 10);
        // 1.5 压缩算法
        properties.put(ProducerConfig.COMPRESSION_TYPE_CONFIG, "snappy");
        // 2. 创建生产者对象
        KafkaProducer<String, String> producer = new KafkaProducer<String, String>(properties);
        // 3. 通过生产者对象发送消息
//        ProducerRecord<String, String> producerRecord = new ProducerRecord<>("itheima-topic", "key001", "hello kafka");

        // ProducerRecord<String,String> producerRecord = new ProducerRecord<>("itheima-topic","hello kafka");

        ProducerRecord<String, String> producerRecord = new ProducerRecord<>("itcast-topic-input", "hello kafka");
        ProducerRecord<String, String> producerRecord2 = new ProducerRecord<>("itcast-topic-input", "hello redis");

        for (int i = 0; i < 4; i++) {
            if (i < 2) {
                // 同步发送
                RecordMetadata recordMetadata = producer.send(producerRecord).get();
            } else {
                RecordMetadata recordMetadata = producer.send(producerRecord2).get();
            }
        }
        // 异步发送
        /*producer.send(producerRecord, new Callback() {
         *//**
         * 发送完成(完成不代表是成功)后自动回调的方法
         * @param recordMetadata
         * @param e
         *//*
            @Override
            public void onCompletion(RecordMetadata recordMetadata, Exception e) {
                if (e != null){
                    // 记录日志
                    e.printStackTrace();
                }else {
                    // 发送成功
                    System.out.println(recordMetadata.partition());
                    System.out.println(recordMetadata.offset());
                }
            }
        });*/

        // 4. 关闭消息通道
        producer.flush();
        producer.close();


    }
}
